(...) In typical modern PC mouse driver the actual cursor movement is not linearly related to the mouse movement. This might sound a bit strange but it has been found that there are better ways to change the mouse movement to cursor muvement than just simply causing one mouse step to move the cursor one pixel. Xerox was the company which started development of mouse and graphical user interfaces. Apple took many ideas from Xerox and developed them further in their products. During the pioneering research done at Xerox and Apple in the devellopment of the graphical user interface (GUI), it became apparent that no particular ratio between mouse movement and cursor movement was best suited for all tasks.
Early work detected that there are two basic movements in the use of pointing devices: move cursor to desired area and then exactly to desired target. Those two movements have contradictory requirements, so Apple solved the problem by monitoring the mouse movements and change it's CPI (counts per inch) characteristics. When the mouse was moved slowly it remained 100 CPI and when the mouse was moved fast it appears to be 400 CPI mouse. This method of adjusting CPI based on its usage has now been adopted by the default driver in Windows 95 and is now the most commonly accepted way of translating mouse movements to cursor screen movement (Quelle: http://www.hut.fi/~then/mytexts/mouse.html)
Etwas mehr...
When people talk about the movement of the mouse, you often hear the term resolution. For a mouse, resolution is referred to in terms of clicks per inch, or CPI. A click is simply the signal sent to the system to tell it that the mouse has moved. The higher the CPI, the higher resolution. Both mice and trackballs have resolution, because both rely on the movement of a ball to translate the movement of the cursor.
Keep in mind that despite how it appears at first, a mouse with a higher resolution is not necessarily more precise. In fact, almost the opposite is true. Higher resolution means that the mouse moves further for each given movement on the ball. The result is that the movement is faster, not more precise. Because precision is really determined by your own hand movement, experience has shown me that you get better precision with a mouse that has a lower resolution. (Quelle: http://www.linux-tutorial.info…in/display.pl?136&0&0&0&3
...und noch mehr... (Bezüglich Resolution (auch Monitor) und Beschleunigung)
(Quelle:http://www.tomshardware.com/co…11026/opticalmice-01.html)